Photo Source: Air-Ring   It looks like something straight out of dystopian sci-fi, but then here we are. Biotlab has presented a neck-mounted wearable that provides you with a range of magnetic face shields, and a personal supply of HEPA-filtered, UV-sterilized air.   The Air-Ring drapes around your neck, with the guts of the device at the back and battery arrays resting down your chest. It slips on and off easily, with twin adjustable arms rising up to frame your face.   Air is drawn into the unit at the back through a powered blower, which...